✓ Quick answer
Your new mattress likely feels too firm because your body hasn’t broken in the materials yet, or because the mattress is firmer than the store model due to compression. Most foam and hybrid beds need 30 to 60 days to soften. If it’s still unyielding after that, check your foundation and consider a softer topper.
Why it happens
A new mattress that feels like a board is common and usually temporary. Here are the main reasons:
- Break in period. Many memory foam and latex mattresses are compressed and shipped in a box. The foam cells are tight and need time to expand and relax. This can take several weeks.
- Foundation or box spring mismatch. A slatted base with gaps wider than 3 inches can make a mattress feel firmer. A too-rigid foundation also removes natural give.
- Temperature sensitivity. Foam softens with warmth. In a cold room, a new mattress will feel noticeably harder until your body heat warms it.
- In-store vs. at-home difference. Showroom models have been walked on and slept on for months. Your new one is fresh from the factory. Read more about why your mattress feels firmer than the store model.
- Wrong firmness level. You may have chosen a firm or medium firm model when a plush or soft option suits your sleep style better.
How to check
Before you decide on a fix, rule out obvious problems:
- Check the foundation. Ensure slats are no more than 3 inches apart. If using a box spring, make sure it’s not a low-profile or rigid platform that doesn’t flex.
- Measure the room temperature. If it’s below 65 degrees Fahrenheit, the mattress will feel stiffer. Warm the room or use a mattress protector that retains heat.
- Walk test. Walk across the mattress in your bare feet. If it feels uniformly hard with no sinkage at pressure points, it likely needs more break in time.
- Check the tag. Some mattresses have a “firm” side and a “plush” side. Flip or rotate if applicable.
- Compare to the return policy. Most online brands give a 100 night trial. Note how many nights you’ve used it.
What to do
Try these steps in order, waiting a week or two between each to see if it helps.
- Give it time. Sleep on the mattress for at least 30 nights. Walk on it in clean socks for a few minutes each day to speed up the break in. This is normal for most best mattress in a box models.
- Warm it up. Use a heated mattress pad or turn up the thermostat an hour before bed. Body heat will soften foam layers faster.
- Add a mattress topper. A 2 to 3 inch soft latex or memory foam topper can immediately fix a too firm feel without voiding the warranty. This is the fastest fix.
- Adjust the base. If you have an adjustable base, raise the head and legs slightly to change the pressure points. Even a small angle can help.
- Consider a different mattress. If after 60 nights it still feels like concrete, and a topper doesn’t help, the mattress is simply too firm for you. Use the trial period to exchange or return it. When shopping again, try a plush or soft model from a brand with a generous trial. Check our mattress buying guide for tips on matching firmness to your weight and sleep position.
| Cause |
Typical fix |
Timeframe |
| Break in period |
Walk on it, sleep on it |
30 to 60 days |
| Cold room temperature |
Warm the room, use a heated pad |
Immediate relief |
| Wrong foundation |
Fix slat spacing or swap base |
Same day |
| Too firm for your body |
Add a topper or exchange |
Within trial period |
Common mistakes
- Returning too early. Many people give up after a week. Most foam mattresses need at least 30 days to soften.
- Adding a firm topper. A firm topper will make the problem worse. Always choose a soft or plush topper for a too firm mattress.
- Ignoring the base. A sagging box spring or wide slats can create a hard spot in the center. Check before blaming the mattress.
- Buying a new mattress without checking weight. Heavier sleepers (over 230 pounds) often need a firmer mattress. Lighter sleepers (under 150 pounds) usually need a softer one. If you are lighter, a medium or firm mattress may always feel too hard.
When a new mattress makes sense
If you’ve tried all the fixes above and the mattress still feels too firm after 60 days, a new mattress makes sense. This is especially true if you experience numbness, tingling, or hip and shoulder pain. Many online brands offer free returns during the trial. When you buy again, look for a soft or plush model in your budget. For hot sleepers who need a softer feel, a best cooling mattress with a plush top can balance comfort and temperature. If your current mattress is less than 5 years old, see our guide on how often to replace a mattress before deciding.
Frequently asked questions
How long does it take for a new mattress to soften?
Most memory foam and hybrid mattresses soften noticeably within 30 to 60 nights. Some latex beds may take up to 90 days. Walking on the mattress daily can speed this up.
Will a mattress topper fix a mattress that is too firm?
Yes, a 2 to 4 inch soft topper made of memory foam or plush latex can make a firm mattress feel comfortable. It is the most affordable and reversible fix.
Can I return a mattress if it feels too firm?
Most online mattress brands offer a 100 night trial and free returns if you are not satisfied. Check the warranty and return policy before buying. In store purchases may have a shorter trial period.